Multiple gravity conveyer.



M. G. SGHWAB. MULTIPLE GRAVITY OONVEYER.

APPLICATION FILED OUT. 24, 1907. 961,804, Patented June 21, 1910.

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I 5 3 it M. G. SGHWAB.

MULTIPLE GRAVITY GONVEYER.

APPLICATION FILED 00124, 1907.

Patented June 21, 1910.

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UNITED STATES PATENT @FFIQE.

MARTIN C. SCHWAB, OF CHICAGO, ILLINOIS, ASSIGNOR TO GRAVITY CONVEYOR COMPANY, A CORPORATION OF NEW YORK.

To all whom it may concern:

Be it known that I, MARTIN C. SOHWAB, a citizen of the United States, residingat Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Multiple Gravity Conveyers, of which the following is a specification.

My invention relates to gravity conveyers, and one of its objects is the provision of a conveyer having a larger'diameter near the base than at the top, the conveyer of the smaller diameter extending to the upper floors of a building to receive light packages and merging into the larger conveyer.

Other objects will appear hereinafter, the novel combinations of elements being pointed out in the appended claims.

Figure l is a sectional elevation of a large and small conveyer combined, the smaller conveyer being located centrally with relation to the larger conveyer; Fig. 2 is a similar View but with the smaller conveyer at one side of the center of the large conveyer; Fig. 3 is a section on the line 33 of Fig. 2; Fig. 4 is a sectional elevation of a modification in which two small conveyers merge into the large conveyer; Fig. 5 is a section on the line 5-5 of Fig. 4:; Fig. 6 is a view similar to Fig. 4: of a modification; and Fig. 7 is a section on the line 77 of Fig. 6.

Referring to Fig. 1, the larger conveyer A comprises an outer cylindrical shell or casing 1, a central inner core 2, and an interposed spiral blade3, all of usual construction. Located above the conveyer A is a conveyer B similar to conveyer A, but of smaller diameter and comprising an outer shell 1 and a spiral blade 3 surrounding the core 2 which extends through both cas ings. Doors 5 are conveniently located with respect to the floors 6 to receive articles delivered to the conveyers. The lower end of the casing 1 opens into the casing 1, and the lower end of the spiral blade 3 merges into the blade 3, so that the two conveyers A and B may be considered as a single conveyer having sections of different diameters the smaller section being sufficient to accommodate the smaller articles to be con veyed from the upper floors of a store or building, while the larger section provides for larger boxes and bundles that may be delivered to the conveyer at the lower floors.

Specification of Letters Patent.

Application filed October 24, 1907.

Patented June 21, 1910.

Serial No. 398,965.

This construction serves the purpose of a large conveyer for the lower floors, and an additional small conveyer extending the en tire height of the building, while securing the advantages of lessened cost of construction and installment, economy of space, etc. Similar advantages over a single large conveyer are also secured by, the present invention.

Figs. 2 and 3 show a modified construction in which the small conveyer B is located at one side of the center of the larger conveyer A. The small conveyer is in this instance provided with a central core 2 separate from the core 2 of the large conveyer. The upper end of the spiral blade 3 in Fig. 2 has a portion which terminates in a horizontal edge 8 extending between the cores 2 and 2*, and a connecting portion 9 between the core 2 and the shell of the easing which merges into the spiral blade 3. The smaller casing 1 extends a short distance within the shell 1, the lower edge of the casing 1 following the outer edge of the spiral to the point where it meets the shell 1. It will thus be seen that the outer edge of the spiral blade is substantially in contact wit-h the shells throughout its length so that articles are prevented from being crowded off the spiral blade or thrown off by centrifugal force during their descent through the conveyer.

Figs. 4 and 5 show a construction combining two small conveyers B B? with a large conveyer A The construction of the conveyers A and B is substantially like that of the conveyers A, B of Fig. 2. The upper end of the large spiral blade 3, however, in Fig. 4 instead of having a horizontal edge 8 extending entirely across between the cores 23-2", has only a short horizontal edge 8, the remaining portion between the two cores being continued as an inclined strip 3 curved as shown in Fi 5 and merging into the spiral blade 3 of the conveyer B Guiding walls 10 extending along the edges of the strip 3 and perpendicular thereto merge into the casing of the conveyer B and serve to guide articles in their descent along the strip 3*.

Figs. 6 and 7 show a modification of the connections between the large conveyer A and the smaller conveyer B at the left-hand side. In this construction the upper end of articles descending through the conveyer B from striking the conveyer B A central conveyer B, such as shown in Fig. 1, might obviously be combined with one of the eccentrically located conveyers B, B of the other figures, or if desired more than two of the smaller conveyers may be united with a single large-conveyer.

I wish not to be limited to the exact construction disclosed, as various changes in details of construction and arrangement of parts might be made without departing from the spirit and scope of my invention.

What I claimas new and desire to secure by Letters Patent of the United States is 1. The combination of two gravity conveyers of different sizes united to form a single conveyer.

2. In a gravity conveyer, the combination of vertically disposed cylindrical shells of diflferent sizes united to form a single passageway, and :means for guiding articles spirally therethrough.

3. The combination of superposed shells of different cross-sectional areas, and a stationary device forminga continuous guide for articles passing therethrough.

4. In a conveyer, the combination of cylindrical shells of different diameters united to form a continuous passage, and stationary means for guiding articles spirally through said passage.

5. In a gravity conveyer, the combination of vertically disposed communicating cylindrical shells of different diameters, and means for guiding articles through the shells.

6. A gravity conveyer formed with a passageway comprising sections of .difierent cross-sectional areas, and stationary means for guiding articles spirally therethrough.

7. Ina gravity conveyer, the combination of tubular sections of diflerent diameters, and a stationary spiral guide extending into both sections.-

8. In a gravity conveyer, the combination of communicating tubular shells of different diameters, and fixed spiral guides within the shells of sizes proportional to the diameters of the shells.

9. In a conveyer, the combination of communicating tubular shells of diflerentdiameters, and spiral guides of different widths within the shells, said shells and guidesbeing united to form a single passageway and a continuous guide extending through said passageway.

10.. In a conveyer, the combination ofcylindrical shells of difierent diameters, and

spiral blades of 'difierent widths united in the form of a single spiral guide extending through the shells.

11. In a conveyer, the combination of wide and narrow spiral blades united as a single blade, and cylindrical shells surrounding the blades.

12. Ina conveyer, the combination of a strip of sheet material comprising longitudinalsections of different widths, each spirally twisted, and walls connected to said strips.

13. In a conveyer, the combination of a strip of sheet material comprising longitudinal sections of substantially different uniform widths, the entire strip being twisted in the form-of a continuous spiral, and means coacting with said strip to form a gravity conveyer.

14:.1I1'1 a conveyer, the combination with a cylindrical shell of large diameter, of a.

superposed cylindrical shell of smaller diameter, and a helical guide extending through the shells.

-15. In a conveyer, the combination with a vertical cylindrical shell, of a superposed cylindrical shell of smaller diameter, and a spiral bladeextending through the shells with one of its edges substantially in contact with the shells throughout its length.

'16. In a conveyer, the combination with cylindrical shells of different diameters,of a core extending through the shells, and a spiral blade surrounding the core.

17. In a conveyer, the combination with a plurality ofconcentrically arranged cylindrical shells of different diameters, of a single'core extending through the shells, and a spiral blade surrounding the-core.

18. In a conveyer, the combination with a vertical cylindrical shell, of a concentric superposed cylindrical shell of smaller diameter, a concentric core extending through the shells, and a spiral blade surrounding the core'and extending through both shells.

19. In a conveyer,thecombination with a first-named blade.

22. In a conveyer, the combination with -a vertical. cylindrical shell, of superposed shells of smaller diameter opening; into the larger shell on opposite sides of its diameter, and means for guiding articles through the shells.

23. In a conveyer, the combination with a vertical cylindrical shell, of a plurality of superposed shells of smaller diameter opening into the larger shell, a spiral blade within the larger shell and spiral blades within the smaller shells forming continuations of the blade in the larger shell.

24;. In a conveyer, the combination with communicating tubular shells, of a spiral blade in each shell, a strip connecting the blades, and guide walls extending along the strip.

25. In a conveyer, the combination with a vertical cylindrical shell, of a cylindrical shell of smaller diameter communicating therewith, spiral blades within the shells, I one of said blades having an extension uniti ing the blades, and guide walls substantially perpendicular to said extension.

26. In a conveyer, the combination with a vertical cylindrical shell or casing, of cylindrical shells of smaller diameter opening into the larger shell, a spiral blade Within the larger shell, spiral blades within the smaller shells and connected to said firstnamed blade, and a deflector in position to prevent articles in their passage from one of the smaller shells to the larger shell from striking the other of the smaller shells.

In testimony whereof, I have signed my name to this specification in the presence of two subscribing witnesses.

MARTIN G. SCHWAB.

Witnesses:

CARL P. SCHROEDER, G. F. GEXLIGKA. 

